Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom.
Phys Rev Lett. 2015 Apr 17;114(15):151301. doi: 10.1103/PhysRevLett.114.151301. Epub 2015 Apr 13.
We present an accurate model of the muon-induced background in the DAMA/LIBRA experiment. Our work challenges proposed mechanisms which seek to explain the observed DAMA signal modulation with muon-induced backgrounds. Muon generation and transport are performed using the MUSIC/MUSUN code, and subsequent interactions in the vicinity of the DAMA detector cavern are simulated with Geant4. We estimate the total muon-induced neutron flux in the detector cavern to be Φ(n)(ν)=1.0 × 10(-9) cm(-2) s(-1). We predict 3.49 × 10(-5) counts/day/kg/keV, which accounts for less than 0.3% of the DAMA signal modulation amplitude.
我们提出了一个在 DAMA/LIBRA 实验中精确的μ子诱导背景模型。我们的工作挑战了一些旨在用μ子诱导背景来解释所观测到的 DAMA 信号调制的提议机制。μ子的产生和输运是用 MUSIC/MUSUN 代码来执行的，随后在 DAMA 探测器洞穴附近的相互作用是用 Geant4 来模拟的。我们估计探测器洞穴中的总μ子诱导中子通量为 Φ(n)(ν)=1.0×10(-9)cm(-2)s(-1)。我们预测到 3.49×10(-5)counts/day/kg/keV，这只占 DAMA 信号调制幅度的不到 0.3%。
